Machining process of high-performance stainless steel and seamless steel pipe

A technology of seamless steel pipe and processing technology, which is applied in the direction of rigid pipe, pipe, pipe/pipe joint/pipe fitting, etc., can solve the problems of weak oxidation resistance, poor high temperature corrosion resistance, etc., and achieve the effect of strong oxidation resistance

Active Publication Date: 2006-08-16
JIANGSU WUJIN STAINLESS STEEL PIPE GRP
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of existing austenitic steels such as high temperature resistance, high pressure, poor corrosion res

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A high-performance stainless steel seamless steel pipe processing technology adopts the following process: round steel preparation, round steel heating, hot rolling piercing, head cutting, pickling, grinding, lubrication, cold rolling, degreasing, solution heat treatment, straightening Straightening, pipe cutting, whitening, packaging and storage; the round steel adopts the smelting method of argon oxygen decarburization refining combined with electroslag remelting and composition fine-tuning electric furnace steelmaking, adding copper Cu, niobium Nb, nitrogen N , manganese Mn and titanium Ti, wherein copper Cu accounts for 2.5-3.5%, niobium Nb accounts for 0.2-0.6%, nitrogen N accounts for 0.05-0.12%, manganese Mn≤0.5%, and titanium Ti accounts for 0.07-0.13%. Among them: in the round steel heating process, the heating temperature is 980-1150°C, and the heating time is 60-80min; in the hot-rolling and piercing process, the hot-rolling temperature is greater than 1100°C;...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention process technology comprises the following steps of preparing of the round steel, heating of the round steel, hot-rolling punching, cropping, pickling, coping, lubricating, cold-rolling, defatting, solution heat treating, straightening, pipe-cutting, packing and putting in storage. In the round steel are added copper, Niobium, chlorine, manganese and titanium, wherein the copper 2.5~3.5 percent, Nb 0.2~0.6 percent, Cl 0.05~0.12 percent, Mn less than or equal to 0.5 percent and Ti 0.07~0.13 percent.

Description

Technical field [0001] The invention relates to a processing technology of stainless steel seamless steel pipe, especially a processing technology of high-performance stainless steel seamless steel pipe used in the fields of supercritical power plant boiler large-capacity unit, nuclear power unit, petroleum cracking device, large-scale coal liquefaction device, etc. . Background technique [0002] The power plant boiler units originally used in my country are generally below 300MW, and the units greater than 300MW are all imported from abroad. The pipes used in the unit are all ordinary austenitic steels. Although ordinary austenitic steels have high thermal strength, they have large thermal expansion coefficients, poor thermal conductivity, poor steam oxidation resistance and high temperature corrosion resistance, and high cost. Contents of the invention [0003] In order to overcome the shortcomings of existing austenitic steels such as poor high temperature resistance,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F16L9/02C22C38/00
Inventor 章建新
Owner JIANGSU WUJIN STAINLESS STEEL PIPE GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap